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Introduction to Linux - A Hands on Guide

This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.

I'm having a problem with certain programs crashing and in order to get help from the authors (the crashes are caused by dri when I run OpenGL programs) I'd like to reproduce the crash, then do a back trace to give them information about it. I'm having issues, and I'm hoping someone knows how to help me with them. The directions they give to do the back trace are to run the following commands:

This GDB was configured as "i586-mandrake-linux-gnu"...which glxgears: No such file or directory.

/home/springshades/core: No such file or directory.

However, the program continues to run. Now, after the fourth command I get:

No stack.

Anyone know what this problem could be? I have NO experience with back traces, so I don't even know what to google for. I've tried googling back trace, but it seems like this or similar sets of commands work for just about everyone else. Could this be a Mandriva LE 2005 bug? Specific to my distro or something? I'm using the kernel that comes with the distro, haven't recompiled it.

Thanks, this probably should have helped, but still issues. I'm wondering if maybe the program is seg faulting before the debugger can even get any information. I'm not sure. I'm going to give up on this approach for now, thanks for your help.